CN212348248U - Application VOCs exhaust treatment device - Google Patents
Application VOCs exhaust treatment device Download PDFInfo
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- CN212348248U CN212348248U CN202020602825.1U CN202020602825U CN212348248U CN 212348248 U CN212348248 U CN 212348248U CN 202020602825 U CN202020602825 U CN 202020602825U CN 212348248 U CN212348248 U CN 212348248U
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Abstract
The utility model relates to an application VOCs exhaust treatment device, including zeolite runner, heat exchanger and combustion furnace system, the waste gas that contains VOCs gets into total air supply pipe after multistage filtration, and the waste gas that gets into the zeolite runner through first branch gas circuit directly discharges into the chimney through first blast pipe after adsorption zone, and the waste gas that gets into the zeolite runner through second branch gas circuit gets into heat exchanger behind the cooling zone, and the waste gas after being heated gets into combustion furnace system through high concentration air supply pipe after the desorption zone of zeolite runner again and burns, and the waste gas after burning discharges into the chimney through the second blast pipe, be equipped with the second valve on the high concentration air supply pipe, be equipped with the VOCs detector on the first blast pipe. The waste gas treatment device utilizes the same set of zeolite rotating wheel and the combustion furnace system, can meet the waste gas treatment of solvent-based coatings with higher VOCs content, and can also meet the waste gas treatment of coatings with lower VOCs content.
Description
Technical Field
The utility model relates to an abandonment processing, concretely relates to application VOCs exhaust treatment device.
Background
In China, VOCs (volatile organic compounds) volatile organic compounds refer to organic compounds with the saturated vapor pressure of more than 133.32Pa at normal temperature, the boiling point of 50-260 ℃ below under the standard atmospheric pressure of 101.3kPa and the initial boiling point of 250 ℃, or any organic solid or liquid capable of volatilizing at normal temperature and normal pressure. Because acute poisoning is easily caused when the concentration of volatile organic compounds in the air is too high, bad states such as headache, dizziness, cough, nausea and the like can occur in light people, and hepatotoxicity and even coma can occur in severe people; furthermore, exhaust gas containing high concentrations of VOCs, when discharged into the atmosphere, affects the quality of the air, resulting in increased PM2.5 in the atmosphere, and the like. Therefore, in productive life, strict control of the emission of VOCs is required.
The waste gas discharged from a spraying workshop contains a large amount of VOCs, the waste gas needs to be treated, a molecular sieve rotating wheel is usually adopted at present and is combined with an RTO (Regenerative Thermal Oxidizer) oxidation system to treat the waste gas, wherein the molecular sieve rotating wheel needs continuous concentration and desorption, and the RTO oxidation system needs continuous incineration, so the method is suitable for treating the waste gas with high VOCs concentration, however, the concentration of VOCs produced by the different types of coating used in the actual spray line on a daily basis varies, and particularly in these years low voc coatings have been developed, the change of the emission concentration is larger in the switching process of the common solvent type coating and the coating with low volatility organic matter, when the existing waste gas treatment equipment is adopted for the water-based or high-solid paint with lower volatile organic compounds, the waste gas combustion cannot maintain the heat required by the RTO combustion, so a large amount of natural gas is supplemented, and great energy waste exists.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides an application VOCs exhaust treatment device adopts intermittent type formula ground desorption to handle and fire burning furnace burning among this processing apparatus, consequently not only can be applicable to high concentration VOCs exhaust treatment, also can be applicable to low concentration VOCs exhaust treatment, and need not supply the natural gas to burn, has reduced the energy waste.
The utility model discloses a solve the technical scheme that its technical problem adopted and be:
a VOCs coating waste gas treatment device comprises a zeolite rotating wheel, a heat exchanger and a combustion furnace system, the zeolite rotating wheel comprises an adsorption area, a cooling area and a desorption area, waste gas containing VOCs is filtered in multiple stages and then enters a main gas supply pipe to be divided into two paths which are respectively a first branch gas path and a second branch gas path, wherein the first branch gas path enters an adsorption area of the zeolite rotating wheel for adsorption and purification and then is directly discharged into a chimney through a first exhaust pipe, the second branch gas path enters a cooling area of the zeolite rotating wheel and then is preheated and then enters a heat exchanger for heating, the heated waste gas enters a desorption area of the zeolite rotating wheel again, the VOCs waste gas after adsorption and desorption enters a combustion furnace system through a high-concentration gas supply pipe for incineration, and the incinerated waste gas is discharged into the chimney through a second exhaust pipe, and a second valve and a desorption fan are arranged on the high-concentration air supply pipe, and a VOCs detector is arranged on the first exhaust pipe.
Preferably, the control system is further arranged and is electrically connected with the VOCs detector, the zeolite rotating wheel, the heat exchanger, the second valve, the desorption fan and the combustion furnace system, when the detection result received by the control system from the VOCs detector is smaller than or equal to a set value, the control system controls the zeolite rotating wheel to carry out adsorption treatment, when the detection result received by the control system from the VOCs detector exceeds the set value, the control system starts the combustion furnace system, and when the temperature in the combustion furnace system rises to reach the set temperature, the desorption treatment of the zeolite rotating wheel is started by opening the second valve and the desorption fan.
Preferably, the heat exchanger is a jacketed heat exchanger or an electric heater.
Preferably, the heating gas in the jacketed heat exchanger is from a furnace system.
Preferably, a first valve is arranged on the main air supply pipe, and a VOCs detector is arranged on the chimney.
Preferably, the burner system employs one of a direct-fired furnace with heat recovery, a regenerative-fired furnace, a catalytic combustion device, and a regenerative catalytic combustion device.
The utility model has the advantages that: the utility model discloses mainly include the zeolite runner, heat exchanger and fire burning furnace system, the zeolite runner is used for the concentration to waste gas, after adsorbing concentration, clear gas passes through the chimney and discharges, and waste gas after the concentration is burnt through firing burning furnace system and is discharged, the utility model discloses add the VOCs detector on first exhaust pipe to VOCs's concentration in the real-time monitoring exhaust gas, the working method according to VOCs's concentration control exhaust treatment device, when the concentration of the VOCs who monitors is less than the default, the zeolite runner only adsorbs the processing, and does not carry out the desorption processing, and the burning furnace system also stop operation, when the concentration of the VOCs who monitors is higher than the default, start and fire burning furnace system operation, the zeolite runner adsorbs simultaneously and the desorption processing. Therefore, the waste gas treatment device utilizes the same set of zeolite rotating wheel and combustion furnace system, can meet the waste gas treatment of solvent-based coatings with higher VOCs content, can also meet the waste gas treatment of water-based or high-solid coatings with lower VOCs content, and the like, does not generate the waste of natural gas, and is particularly suitable for the waste gas treatment of different coatings used on site or unstable emission concentration.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a zeolite wheel according to the present invention;
in the figure: 10-zeolite rotating wheel, 11-adsorption zone, 12-cooling zone, 13-desorption zone, 21-total gas supply pipe, 22-first branch gas circuit, 23-second branch gas circuit, 24-first exhaust pipe, 25-first valve, 30-combustion furnace system, 31-high concentration gas supply pipe, 32-second exhaust pipe, 33-second valve, 40-heat exchanger, 50-VOCs detector and 60-chimney.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Example (b): as shown in fig. 1-2, a waste gas treatment device for coating VOCs comprises a zeolite wheel 10, a heat exchanger 40 and a combustion furnace system 30, wherein the zeolite wheel 10 comprises an adsorption zone 11, a cooling zone 12 and a desorption zone 13, waste gas containing VOCs enters a total gas supply pipe 21 after being filtered in multiple stages and is divided into two paths, namely a first branch gas path 22 and a second branch gas path 23, wherein the first branch gas path 22 enters the adsorption zone 11 of the zeolite wheel 10 for adsorption and purification and then directly enters a chimney 60 through a first exhaust pipe 24, the second branch gas path 23 enters the cooling zone 12 of the zeolite wheel 10 for preheating and then enters the heat exchanger 40 for heating, the heated waste gas enters the desorption zone 13 of the zeolite wheel again, the adsorbed and desorbed VOCs waste gas enters the combustion furnace system 30 through a high-concentration gas supply pipe 31 for incineration, the incinerated waste gas is discharged into the chimney 60 through a second exhaust pipe 32, and a second valve 33 and a desorption fan are arranged on the high-concentration air supply pipe 31, and a VOCs detector 50 is arranged on the first exhaust pipe 24. The arrows in fig. 1 indicate the flow direction of gas, the utility model discloses mainly include zeolite runner 10, heat exchanger 40 and combustion furnace system 30 to add VOCs detector 50 on first exhaust pipe 24, thereby monitor VOCs's concentration in the exhaust gas in real time, control exhaust treatment device's working method according to VOCs ' concentration, when the concentration of the VOCs who monitors is less than the default (if the default is 20 mg/m)3) When the zeolite wheel 10 is in the adsorption state, the desorption process is not performed, and the operation of the burner system is stopped, when the concentration of the detected VOCs is higher than a predetermined value (for example, a predetermined value of 60 mg/m)3) When the temperature of the zeolite runner reaches the set temperature, the second valve 33 and the desorption fan are opened, and the cooling area 12 and the desorption area 13 of the zeolite runner start to work. Therefore, the waste gas treatment device utilizes the same set of zeolite rotating wheel and combustion furnace system, wherein the adsorption treatment of the zeolite rotating wheel continuously operates, and the desorption treatment of the zeolite rotating wheel and the interval operation of the combustion furnace system can meet the waste gas treatment of solvent-based coatings with higher VOCs content and the waste gas treatment of waterborne or high-solid coatings with lower VOCs contentAnd the waste of natural gas is avoided, and the method is particularly suitable for treating waste gas with different coating materials or unstable emission concentration in field.
The utility model discloses in still be equipped with control system, this control system electric connection VOCs detector 50, zeolite runner 10, heat exchanger 40, second valve 33, desorption fan and fire burning furnace system 30, when control system received the testing result of VOCs detector and is less than or equal to the setting value, this control system control zeolite runner 10 adsorbs the processing, when control system received the testing result of VOCs detector and exceeded the setting value, this control system starts burning furnace system, open second valve 33 and desorption fan and start the desorption processing of zeolite runner promptly after heaing up and reaching the settlement temperature in burning furnace system. The zeolite rotating wheel 10 comprises a support, a concentration rotating wheel and a driving mechanism, the support comprises an adsorption zone 11, a desorption zone 13 and a cooling zone 12 which are circumferentially arranged, the concentration rotating wheel is of a disc structure and is rotatably installed on the support, the concentration rotating wheel sequentially passes through the adsorption zone, the desorption zone and the cooling zone under the driving of the driving mechanism, VOCs in waste gas passing through the adsorption zone are adsorbed, so that the waste gas is purified, the waste gas passing through the cooling zone is preheated and then further heated in a heat exchanger, and finally the waste gas returns to the desorption zone 13 to perform desorption concentration treatment on the VOCs adsorbed on the concentration rotating wheel; in whole operation process, concentrated runner lasts the rotation, and when second valve 33 closed, desorption district and cooling space do not have gaseous entering, come this processing apparatus's working method of real-time adjustment through control system according to VOCs's concentration, and control accuracy is high, and resources are saved and degree of automation is high, also can adopt manual operation promptly artifical testing result according to the VOCs detector adjusts processing apparatus's operation mode certainly.
The main air supply pipe 21 is provided with a first valve 25, the chimney 60 is provided with a VOCs detector, and the combustion furnace system 30 adopts one of a direct combustion furnace with heat recovery, a regenerative combustion furnace, a catalytic combustion device and a regenerative catalytic combustion device. The heat exchanger 40 is a jacketed heat exchanger or an electric heater, the heating gas in the jacketed heat exchanger comes from the combustion furnace system 30, specifically, the heating gas is high-temperature gas after the combustion furnace system combusts organic matters, the high-temperature gas enters the heat exchanger 40 through a pipeline to heat waste gas, and by adopting the mode, the waste heat in the combustion furnace system is utilized for heating the waste gas, so that resources are saved.
The utility model discloses an operation process: the method comprises the following steps:
the method comprises the following steps: collecting waste gas of a coating line, and carrying out pretreatment such as multi-stage filtration on the waste gas to remove solid particles with large particle sizes in the waste gas, so as to avoid blockage of large particle substances on adsorption holes in the zeolite rotating wheel 10, thereby improving the adsorption effect of the zeolite rotating wheel 10 on VOCs;
step two: conveying the pretreated waste gas to a zeolite rotating wheel 10 for adsorption treatment, wherein when the adsorption treatment is carried out, a second valve 33 is closed, a combustion furnace system stops running, clean gas treated by the zeolite rotating wheel is discharged into a chimney through a first exhaust pipe, the discharged gas is detected in real time through a VOCs detector 50, at the moment, the zeolite rotating wheel 10 continuously rotates and only carries out adsorption treatment, so that the second valve 33 is in a closed state, no gas enters a cooling area and a desorption area of the zeolite rotating wheel 10, and when a control system receives a detection result of the VOCs detector, the zeolite rotating wheel 10 keeps only carrying out adsorption treatment;
step three: when the control system receives that the detection result of the VOCs detector exceeds a set value, the control system starts the combustion furnace system 30 to operate, and when the temperature in the combustion furnace system rises to reach the set temperature, the desorption treatment of the zeolite rotating wheel is started by opening the second valve 33 and the desorption fan;
step four: the desorption treatment was as follows: the waste gas enters the cooling zone 12 of the zeolite rotating wheel 10 through the second branch gas path 23 for preheating and then enters the heat exchanger 40 for heating, the heated waste gas enters the desorption zone 13 of the zeolite rotating wheel again, and VOCs in the adsorption desorption zone is changed into high-concentration waste gas;
step five: the highly concentrated exhaust gas enters the burner system 30 through the high concentration feed pipe 31 for incineration, and the incinerated exhaust gas is discharged into the chimney 60 through the second exhaust pipe 32.
Wherein the set value is in the range of 20-60mg/m3E.g. the treatment apparatus just starts to boilWhen the stone turning wheel is used for adsorption treatment, the detection result of the VOCs detector is more than 60mg/m3When the desorption treatment is carried out, the combustion system and the zeolite rotating wheel are started until the detection result of the VOCs detector is less than 20mg/m3In this case, the desorption treatment of the combustion system and the zeolite wheel may be stopped, and only the adsorption treatment of the zeolite wheel may be performed.
Therefore, the waste gas treatment device adopts the mode of continuous adsorption treatment, combined with intermittent desorption treatment and intermittent oxidation incineration treatment, when the concentration of VOCs in the waste gas is very low, the concentration of VOCs in the waste gas after single zeolite wheel treatment can reach 30mg/m3Even 10mg/m3The concentration of the concentrated waste gas is low, if continuous incineration is adopted, natural gas is basically incinerated during incineration, so that great waste of energy is caused, the carbon emission does not actually decrease and rise reversely, the adsorption saturation time of the zeolite rotating wheel is four times or more longer than that of the prior adsorption saturation time, so that the adsorption time can be prolonged, and the desorption is changed into an intermittent type mode, and therefore, the zeolite rotating wheel adsorption treatment is only adopted for the condition; when the control system receives that the detection result of the VOCs detector exceeds the set value, the combustion furnace system 30 is controlled to start, and the second valve and the desorption fan are opened, namely the zeolite rotating wheel rotates to start desorption treatment, so that the combustion furnace is ensured to burn VOCs instead of natural gas.
Therefore, the waste gas treatment device utilizes the same set of zeolite rotating wheel and combustion furnace system, can meet the waste gas treatment of solvent-based coatings with higher VOCs content, and also meet the waste gas treatment of water-based or high-solid coatings with lower VOCs content, and the like, and can not generate waste of natural gas, thereby being particularly suitable for the waste gas treatment of different coatings used on site or unstable emission concentration.
It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a coating VOCs exhaust treatment device which characterized in that: the waste gas containing VOCs is subjected to multi-stage filtration and then enters a total gas supply pipe (21) and then is divided into two paths, namely a first branch gas path (22) and a second branch gas path (23), wherein the first branch gas path (22) enters the adsorption region (11) of the zeolite rotating wheel (10) for adsorption and purification and then is directly discharged into a chimney (60) through a first exhaust pipe (24), the second branch gas path (23) enters the cooling region (12) of the zeolite rotating wheel (10) for preheating and then enters the heat exchanger (40) for heating, the heated waste gas enters the desorption region (13) of the zeolite rotating wheel again, and the VOCs waste gas subjected to adsorption and desorption enters a combustion furnace system (30) for incineration through a high-concentration gas supply pipe (31), the waste gas after burning discharges into chimney (60) through second blast pipe (32), be equipped with second valve (33) and desorption fan on high concentration air feed pipe (31), be equipped with VOCs detector (50) on first blast pipe (24).
2. The coated VOCs exhaust treatment device of claim 1, wherein: still be equipped with control system, this control system electric connection VOCs detector (50), zeolite runner (10), heat exchanger (40), second valve (33), desorption fan and burning furnace system (30), when control system received the testing result of VOCs detector and is less than or equal to the setting value, this control system control zeolite runner (10) carry out the adsorption treatment, when control system received the testing result of VOCs detector and exceeded the setting value, this control system starts the system, open second valve (33) and desorption fan promptly start the desorption of zeolite runner and handle after rising the temperature and reaching the settlement temperature in the burning furnace system.
3. The coated VOCs exhaust treatment device of claim 1, wherein: the heat exchanger (40) is a jacketed heat exchanger or an electric heater.
4. The coated VOCs exhaust treatment device of claim 3, wherein: the heating gas in the jacketed heat exchanger is from a furnace system (30).
5. The coated VOCs exhaust treatment device of claim 1, wherein: be equipped with first valve (25) on total air feed pipe (21), be equipped with the VOCs detector on chimney (60).
6. The coated VOCs exhaust treatment device of claim 1, wherein: the combustion furnace system (30) adopts one of a direct combustion furnace with heat recovery, a regenerative combustion furnace, a catalytic combustion device and a regenerative catalytic combustion device.
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| CN202020602825.1U CN212348248U (en) | 2020-04-21 | 2020-04-21 | Application VOCs exhaust treatment device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113384993A (en) * | 2021-04-30 | 2021-09-14 | 宇星科技发展(深圳)有限公司 | VOCs treatment system and method |
| CN113521891A (en) * | 2021-06-21 | 2021-10-22 | 郑州日产汽车有限公司 | Modular VOCs processing system |
| CN113877363A (en) * | 2021-09-14 | 2022-01-04 | 徐州徐工施维英机械有限公司 | Low-concentration VOCs waste gas energy-saving treatment method and device |
| CN114225638A (en) * | 2021-11-18 | 2022-03-25 | 浙江菲达环保科技股份有限公司 | Variable-concentration VOCs treatment system and method based on zeolite rotating wheel catalytic oxidation |
| CN115364621A (en) * | 2022-08-08 | 2022-11-22 | 湖北奥瑞金制罐有限公司 | Waste gas treatment process for tank-making spraying workshop |
-
2020
- 2020-04-21 CN CN202020602825.1U patent/CN212348248U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113384993A (en) * | 2021-04-30 | 2021-09-14 | 宇星科技发展(深圳)有限公司 | VOCs treatment system and method |
| CN113521891A (en) * | 2021-06-21 | 2021-10-22 | 郑州日产汽车有限公司 | Modular VOCs processing system |
| CN113877363A (en) * | 2021-09-14 | 2022-01-04 | 徐州徐工施维英机械有限公司 | Low-concentration VOCs waste gas energy-saving treatment method and device |
| CN114225638A (en) * | 2021-11-18 | 2022-03-25 | 浙江菲达环保科技股份有限公司 | Variable-concentration VOCs treatment system and method based on zeolite rotating wheel catalytic oxidation |
| CN115364621A (en) * | 2022-08-08 | 2022-11-22 | 湖北奥瑞金制罐有限公司 | Waste gas treatment process for tank-making spraying workshop |
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